Hi all, Just purchased the car and would appreciate any truthful and proven recommendations. I previously used Amsoil SSO in my mitsubishi, can I use the same? Or any other better oils? I am willing to spend more $$ for better oils. BMW recommends Castrol, but I can't get german castrol in my country and I think the rest of the castrol line up are just average processed group III oils. Or is it the best? Secondly, BMW recommends >15k miles OCI, it is safe? Car millage now is at 66k kilometers. Pls help. Thanks in advance guys!